Inside-tire cord patch



Patented Oct. 28, 1924.

UNITED STATES FRED 0. WHITE, OF MASON CITY, IOWA.

INSIDE-TIRE CORD 'PATGH.

Application filed March 8, 1923. Serial No. 623,637.

To all whom it may concern:

Be it known that I, FRED C. WHITE, a citizen of the United States ofAmerica, and resident of Mason City, Cerro Gordo County, Iowa, haveinvented a new and useful Inside-Tire Cord Patch, of which the followingis a specification.

An object of this invention is to provide a cord patch adapted to bemounted on the inner surface of a damaged casing of a pneumatic tire andcover the damaged portion thereof.

A furtherobject of this invention is to provide improved means forcovering the dama ed portion of a cord casing.

A urther object of this invention is to provide improved means forcovering a damaged portion in the side orquarter of a cord casing.

A further object of this invention is to provide an improved method'ofmaking an insidetire patch.

My invention consists in the construction and method of making an insidetire cord patch as hereinafter set forth, pointed out in the claims andillustrated by the accompanying drawing, in which- Figure 1 is a diagramof my improved patch extended, at one 'stepin the mak ng thereof. Figure2 is an opposite face view of a portion of the device shown in diagramin Figure 1. Fi ure 3 is a longitudlnal section (flattened on theindicated line 3-3 of Figure 1. Figure 4 is a s1de elevation of thecomplete patch moldedto desired form. Figure 5 is an end elevatlon ofthe same on an enlarged scale.'

In carrying out my improved method I construct a patch as follows:Certain pieces of graduated sizes and generally rectangular form arecut, on the b1as, from a sheet of impregnated cord fabric. This cordfabric is acommon article of commerce and consists of parallel cordslaid in intimate rela-' tion and saturated, connected and covered bygum. The largest ofthe several pieces of cord fabric 10 may beconsidered as the base or foundation of the patch and is overlaid at themargins of one face (Fig. 2)

by strips 11 of plain woven fabric and, ultimately, such overlaid faceand said strips are painted or coated with talc to minimize itsadhesiveness to any object, such as an inner tube, in contact therewith.The opposite face of the piece 10 is unaltered temporarily. The nextsmallerpiece -12 of cord supplied with a natural coat of fabric is laidon the natural face of the right angles and said pieces are impressionedtogether by rolling a suitable tool thereon. The next smaller piece .13of cord fabric is laid on the exposed natural face of the piece 12, thecords of the piece 13 crossing the cords of the piece 12 substantiallyat right angles, and said pieces 12, 13 are impressioned together byrolling a suitable tool thereon. The iece 13 is so laid as to expose agreater slde portion of the piece 12 adjacent to the similar exhibitionof the piece 10relative to the piece 12. The next smaller piece 14ofcoi'd fabric is laid on the exposed natural face of the piece 13, thecords of the piece 14 crossing the cords of the piece 13 substantiallyat right angles, in such manner as to expose a greater side portion ofthe piece 13 adjacent to the similar exhibition of the piece 10relative. to the piece 12, and said pieces are impressioned together byrolling a suitable tool thereon. Thus thecenters of the pieces 12, 13and 14 are progressively located eater distances from and on one side-oft e median line of the iece 10,'thus locating the full thickness of t ecompleted patch off-center. The exposed natural faces of the pieces 10,12, 13 and 14 are then 15. The patch thus formed is molded preferably ona heated metal form, to conf inner surface of-an arcuate section. of apneumatic casing and during the operation of molding the gum content andcoating may be partiall ,"vulcanized'. Thus the patch is concavelongitudinally as to the circumference of a casing and 1s concaved'transversely as to the transverse --curvature of said casing, and thepatches are made in different sizes related to different casings.

so that the width of the piece 10 .will fap: proximate to the width ofthe inner face of acasing in which it is to be used.

In the completed patch the smallest piece 14 is outermost in respect ofthe convexity of the patch. In use the completed patch is orm to theemployed within and to cover a break,

roughness or damaged portion of a casing and is placed so that thethickest portion of the patch bridges or extends across the break ordamaged portion. As a considerable number of such breaks or damagedportions 7 occur in the sides or quarters of casings, as

distinguished from the treads, special advantage is found in theoff-center arrangeinent of the plies or layers of the patch 'presentingthe thickest portion'of the patch coincident with the area of the piecel t at one side and adapted to overlay such side or The pieces arearranged with the cords crossing substantial- [ly at right anglesso thatwhen the pieces i the exposed marginal portions of the piece areimpressioned together the whole Will be strengthened as to tensilestrainin any direction. The marginal strips 11 tend to preventseparation of the ends of the cords in 10. This patch preferably is tobe used by repair men to be vulcanized into a cord casing for apermanent vulcanized repair. Patches of this. type may be made for eachand every size of pneumatic cord casing in 1 casings, said larger sizesof casings requiruse. The one illustrated with-four plies is adapted forthe smaller sizes of casings and the number of plies and dimensionsthereof Would'be increased for the larger sizes of ing larger andstronger patches. The mold- I 'ed patch, may be reversed for selectiveuse 1 p on opposite sides of a casing, dependent on of the median lineof the tread of said casthe location of the break or damage laterallying.

. claim as my 1nve'nt1on.

1. An inside tire cord patch comprising a plurality of sheets ofimpregnated cord fabric cut on the bias and of graduated sizes,

said sheets being superimposed and joined 'progressively, said sheetsbeing so arranged in order from the larger to the smaller that theircenters progressively are located greater distances from and on one sideof the median line of the larger sheet, said superimposed and joinedsheets being molded into the shape of the interior surface of an arcuatesection of a pneumatic tire easing and a gum coating on the convexsurface of the assembled sheets.

2. An inside tire cord patch comprising a plurality of pieces ofimpregnated cord fabric cut on the bias and of graduated sizes, saidpieces being superimposed off-center and joined progressively, the cordsof each piece crossing the cords of any adjacent piece substantially atright angles, said superimposed and connected pieces being concavedlongitudinally and transversely, and a coating of gum applied to theconvex surface of the assembled pieces;

3. An inside tire cord patch made of impregnated superimposed connectedbias-cut pieces of cord fabric, each piece being an ranged off-centerrelative to tne adjacent piece, a coating of gum applied to one face andmarginally-arranged strips of Woven fabric applied and secured to theopposite ace.

4. The method of making an inside tire cord patch, which consists offirst forming pieces of graduated sizes from a sheet of impregnated cordfabric by bias cutting, assembling said pieces successively as to sizeface to face so that the cords of one piece cross the cords of anyadjacent piece substantially at right angles, and in such manner thatthe center of each piece is displaced relative to the center of thepiece on which it is mounted impressioning said pieces togethersuccessively, molding the assembled pieces under heat, applying acoating of gum to the convex face of the assembled pieces, applyingmarginal strips of woven fabric to the opposite face of the innermostpiece,

and applying a non-adhesive coating to said strips and the adjacent faceof said inner-.

FRED c." WHITE.)

Mason City, in the county of

